1. Go to the metric prefix exercise listed here and complete. Try the Conversions page also.
http://dbhs.wvusd.k12.ca.us/webdocs/Metric/Metric.html

2. Take the quiz at the bottom of http://library.thinkquest.org/20991/alg/sci_not.html [if your browser's "back" button does not work with Thinkquest sites, use the "GO" [Netscape] or "GO TO" (under edit menu) [Internet Explorer] to get back to this page.]

3. If you've been doing metric conversions so long you're getting a little batty, check out these proposed units of measurement: http://en.wikipedia.org/wiki/List_of_humorous_units_of_measurement. Ever wonder why our measuring system isn't very systematic? Historical info here. I imagine you may not have heard of all the units in the first column here.

4. After visiting http://dbhs.wvusd.k12.ca.us/webdocs/SigFigs/SigFigs.html and this step by step tutorial, try the quiz at http://antoine.frostburg.edu/chem/senese/101/measurement/sigfig-quiz.shtml

5. If you need a bit more practice on units of measure, dimensional analysis, scientific notation, differences between accuracy and precision, go to http://members.aol.com/profchm/basicmth.html and choose one or more of the sites to explore.

After completing any exercises, you can review the site much like you would a book report.